The men then offered them a taxi ride back to their room and they accepted the offer. But on the way to the taxi, three more men emerged and claimed to be police officers. The couple said they were handcuffed and told to get inside the taxi, which was on the Au Thong Nai Pan route.

The men then demanded money from them in exchange for dropping charges of illegal possession of drugs, the tourists said.

Ms Lobanova said she told them that she had no money. One of the men then punched her in the face, took her iPhone 6 and other valuables worth about 30,000 baht.

The gang abandoned the Russian couple on Ban Thong Nang Road in tambon Ban Tai, where they sought help from local people, who took them to Koh Phangan police station to file a complaint. On Wednesday they returned to give further details of what happened to them.

Koh Samui provincial court on Wednesday approved a request for arrest warrants for the suspects on charges of colluding in extortion, assault and illegal detention.

Three of the men, Mr Thanin, Mr Apidet and Mr Thaweesin, turned themselves in on Wednesday.

Mr Thanin denied any involvement, while the two others confessed to having offered to sell “drugs” to the tourists, but claimed it was really a common painkiller ground up to fool tourists into paying for it. They denied assaulting Ms Lobanova.

Pol Maj Gen Apichart said drastic disciplinary action would be taken against Pol Snr Sgt Maj Suriyan if found guilty.

Two Russian tourists tell police on Wednesday that five men tried to extort money from them and then stole personal items at Rin Beach in Koh Phangan district of Surat Thani on Tuesday night, in return for dropping false drugs charges against them. (Photo credit & thank you @ Bangkokpost by Supapong Chaolan)